| Researcher(s) |
Suzanne Holbery (ex (SARDI) Roy Latta (ex (SARDI) Glenn McDonald (UoA) Pichu Rengasamy (ex (SARDI) Ian Richter (SARDI) Ehsan Tavakkoli (ex UoA) |
|---|---|
| Year(s) | 2014 |
| Contributor | SARDI Minnipa Agricultural Centre |
| Trial location(s) |
Minnipa Agricultural Centre, SA
|
To examine the effect of gypsum on soil pH and soil C and whether changes in soil pH could alter productivity of the following cereal crops.
Applying gypsum can reduce soil pH and lower the concentration of dissolved organic carbon (C) to 30 cm depth within a year. Soils with pH > 9 will benefit most from gypsum. The solubilisation of soil organic C increased markedly at pH above 8.5. The availability of aluminium (Al) in soil increases at pH above 9. There was no significant effect of gypsum on the biomass or yields of crops within 2 years.
| Lead research organisation |
University of Adelaide |
|---|---|
| Host research organisation |
SARDI Minnipa Agricultural Centre |
| Trial funding source | DAWR 1203.014 |
| Related program |
National Soil Carbon Program |
| Acknowledgments |
The work was funded by the Australian Department of Agriculture through the Filling the Research Gap under National Soil Carbon Program |
| Other trial partners | Not specified |
| Crop type | Cereal (Grain): Barley |
|---|---|
| Treatment type(s) |
|
| Trial type | Experimental |
| Trial design | Replicated |
| Sow date | Not specified |
|---|---|
| Harvest date | Not specified |
| Plot size | 34m x 2m |
| Plot replication | 3 |
| # | Variety |
Treatment 1
|
Grain yield (t/ha) | pH 0-10cm (pH) | pH 10-20cm (pH) | pH 20-30cm (pH) |
|---|---|---|---|---|---|---|
| 1 | █ Barley:ScopeCL | █ Medic | 2.78 | 8.48 | 8.86 | 9.03 |
| 1 | █ Barley:ScopeCL | █ Peas | 2.85 | 8.3 | 8.4 | 8.74 |
| 2 | █ Barley:ScopeCL | █ Vetch | 2.81 | 8.26 | 8.45 | 8.68 |
| 2 | █ Barley:ScopeCL | █ | ||||
| 3 | █ Barley:ScopeCL | █ | ||||
| 3 | █ Barley:ScopeCL | █ |
| Rainfall trial gsr (mm) | 290mm |
|---|
SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
Jeffrey, S.J., Carter, J.O., Moodie, K.B. and Beswick, A.R. (2001). Using spatial interpolation to
construct a comprehensive archive of Australian climate data , Environmental Modelling and Software, Vol
16/4, pp 309-330. DOI: 10.1016/S1364-8152(01)00008-1.
